The Gilder Lehrman Institute of American History promotes the study and love of American history. The Gilder Lehrman Collection, on deposit at the New York Historical Society, New York City, New York, contains more than 60,000 documents detailing the political and social history of the United States. The collection's holdings include manuscript letters, diaries, maps, photographs, printed books and pamphlets ranging from 1493 through modern times.

The HTA publishes articles, books, essays, documents, historical photos, and links, screened for content, for a broad range of historical subjects. It was founded in 1990 in Mississippi and is one of the oldest history sites on the Internet.

An index to over 1,800,000 obituaries, death & marriage notices & other sources from Ohio from the 1810s to the present day. Actual obits may be ordered from 50 partner libraries; only Hayes Library has online ordering.

Online searchable index to nearly 15,000 reports that survey and describe documents relating to colonial Virginia history that are housed in repositories in Great Britain and other European countries. The survey report images are available online, and there are references to microfilm reels for the original documents.